That will get you all of the stocks in the TSX that meet the MACD requirement vs the symbol $TSX meeting the requirement.

A good way to "test" your alert is to take that same Alert Code and put it into a Scan. Run the Scan and you'll see the results. It's a good practice so that you can see what will be expected in the Alert. You can tweak the code of the Scan as needed. Then take that Scan code and put it in your Alert.